Francisco de Castañeda, also spelled Castonado, was a lieutenant in the Mexican army stationed in San Antonio, in the 1830s.
The soldiers were part of the Presidio San Antonio de Bexar, who were housed in the Alamo fort in late 1835.
Texas Colonel John Moore even made an offer to Castañeda to join with the Texan side and he would retain his rank and pay, but he refused saying he must follow orders and withdrew his men to San Antonio.
Juan Seguin would accept the official Mexican surrender from Francisco de Castañeda and his men, at the Alamo, on June 4, 1836.
Woll reported that Castañeda received a grave wound in the Battle of Salado Creek.